Call us toll-free

Quick academic help

Don't let the stress of school get you down! Have your essay written by a professional writer before the deadline arrives.

Calculate the price


275 Words


H., His6 tag-assisted chemical protein synthesis.

R., Activity-Based Protein Profiling Reagents for Protein Arginine Deaminase 4 (PAD4): Synthesis and in vitro Evaluation of a Fluorescently Labeled Probe.

M., Synthesis of bio-inspired hybrid polymers using peptide synthesis and protein engineering.

Chiral organoborane reagents, in particular [1,3,2]-oxazaborolidines, have been extensively studied and applied as efficient Lewis acid catalysts to a wide range of asymmetric transformations. The B–H oxazaborolidine-borane complexes are frequently reported as convenient catalysts for enantioselective borane reduction of prochiral ketones, imines and oximes, since they are readily prepared from the corresponding aminoalcohols and either borane-THF or borane-DMS complexes., However, the extreme sensitivity of these reagents to atmospheric moisture makes them difficult to isolate and purify. Consequently, they are prepared in situ prior to use in asymmetric reductions. Moreover, B–H oxazaborolidines can form dimers and other species which can affect the nature of catalyst. Impurities present in the catalyst may lead to irreproducible results. On the other hand, B-substituted oxazaborolidines show excellent synthetic utility due to their highly reproducible enantioselectivity, but require careful purification procedures to eliminate traces of boronic acid and their esters. Moreover, the commercially available reagents are expensive, moisture sensitive and unstable during extended storage. Accordingly, the design of new stable, easily available and efficient catalysts is always a challenging task in synthetic organic chemistry.

α-Halo boronic esters in asymmetric synthesis - …

W., Protein semi-synthesis: New proteins for functional and structural studies.

Introduction Borate­ester formation of a carbohydrate's diol functions has been used for a long time for the synthesis, analysis and separation of carbohydrates.

This thesis describes progress on the application of boronic acids and borate esters as catalysts and reagents in synthetic organic chemistry, focusing on two areas: one-pot enolate formation/aldol reactions and amide bond formation.

α-Halo boronic esters in asymmetric synthesis

R.; Waldmann, H., From protein domains to drug candidates: Natural products as guiding principles in the design and synthesis of compound libraries.

R.; Lober, S.; Hubner, H.; Gmeiner, P., Click chemistry on solid phase: parallel synthesis of -benzyltriazole carboxamides as super-potent G-protein coupled receptor ligands.

B., Synthesis of azide-alkyne fragments for click' chemical applications; formation of oligomers from orthogonally protected trialkylsilyl-propargyl azides and propargyl alcohols.

Order now

    As soon as we have completed your work, it will be proofread and given a thorough scan for plagiarism.


    Our clients' personal information is kept confidential, so rest assured that no one will find out about our cooperation.


    We write everything from scratch. You'll be sure to receive a plagiarism-free paper every time you place an order.


    We will complete your paper on time, giving you total peace of mind with every assignment you entrust us with.


    Want something changed in your paper? Request as many revisions as you want until you're completely satisfied with the outcome.

  • 24/7 SUPPORT

    We're always here to help you solve any possible issue. Feel free to give us a call or write a message in chat.

Order now

Synthesis and Application of Borate Ester Bonding …

Margarita Ortiz-Marciales was born in 1943 in Bogotá, Colombia, and obtained her B.S. from Universidad Nacional de Colombia in 1968. She studied at Freiburg and Mainz universities, Germany, for two years with a DAAD fellowship. She received her M.S. from the University of Alabama in Huntsville under Prof. S. McManus supervision in 1973, and her Ph.D. in Organic Chemistry at the University of Alabama-Tuscaloosa in 1979 under the direction of Prof. McManus and Prof. R. Abramovitch. In 1980, she did postdoctoral studies in Prof. G. Larson’s group at the University of Puerto Rico-Río Piedras. She joined the University of Puerto Rico-Humacao in 1981, where she is currently a professor. Her interests are in the development of new synthetic methodologies using boron and silicon compounds for the preparation of important organic intermediates and biologically-active amines.

Chiral Borate Esters in Asymmetric Synthesis. Part 2

Kun Huang received his B.S. degree in 1996 from Sichuan University China. He obtained his Ph.D. in 2006 at Nanjing University, China, working on the asymmetric epoxidation and cyclopropanation of chiral sulfonium ylides. He worked as an advanced synthetic researcher in Wuxi Pharma Tech Co., Ltd, Shanghai, China until he moved to Puerto Rico University in Humacao for his postdoctoral studies with Professor Margarita Ortiz-Marciales on the asymmetric reduction of O-benzyl oximes and ketones catalyzed by spiroborate esters. Later, he had a postdoctoral research position at the chemistry department at Oregon State University where his research was focused on the total synthesis of natural products. Currently, he is a postdoctoral researcher at Peking University in China.

Order now
  • You submit your order instructions

  • We assign an appropriate expert

  • The expert takes care of your task

  • We send it to you upon completion

Order now
  • 37 684

    Delivered orders

  • 763

    Professional writers

  • 311

    Writers online

  • 4.8/5

    Average quality score

Order now
  • Kim

    "I have always been impressed by the quick turnaround and your thoroughness. Easily the most professional essay writing service on the web."

  • Paul

    "Your assistance and the first class service is much appreciated. My essay reads so well and without your help I'm sure I would have been marked down again on grammar and syntax."

  • Ellen

    "Thanks again for your excellent work with my assignments. No doubts you're true experts at what you do and very approachable."

  • Joyce

    "Very professional, cheap and friendly service. Thanks for writing two important essays for me, I wouldn't have written it myself because of the tight deadline."

  • Albert

    "Thanks for your cautious eye, attention to detail and overall superb service. Thanks to you, now I am confident that I can submit my term paper on time."

  • Mary

    "Thank you for the GREAT work you have done. Just wanted to tell that I'm very happy with my essay and will get back with more assignments soon."

Ready to tackle your homework?

Place an order